body{
    background: url("../images/bg/3.png");
    background-size:cover;
    /*animation-name:myfirst;
    animation-duration:12s;
    !*变换时间*!
    animation-delay:2s;
    !*动画开始时间*!
    animation-iteration-count:infinite;
    !*下一周期循环播放*!
    animation-play-state:running;*/
    /* 动画开始运行*/
}
/*@keyframes myfirst
{
    0%   {background:url("../images/bg/5.png");}
    34%  {background:url("../images/bg/2.png");}
    67%  {background:url("../images/bg/3.png");}
    100% {background:url("../images/bg/5.png");}
}*/
.form{background: rgba(255,255,255,0.2);width:400px;margin:120px auto;}
.list-group-item{background: rgba(255,255,255,0.2);}
/*阴影*/
.fa{display: inline-block;top: 27px;left: 6px;position: relative;color: #ccc;}
input[type="text"],input[type="password"]{padding-left:26px;}
.checkbox{padding-left:21px;}
#register{
    float: right;
    padding-top: 20px;
}
.col-md-9{padding-bottom: 20px}
col-sm-3{padding:20px}
